Engine cylinder block structure

Abstract

The utility model relates to the technical field of engines, in particular to an engine cylinder block structure which comprises a cylinder block body. The cylinder body comprises a box body and a cylinder head integrally formed on the box body, and a cylinder cover is detachably mounted and fixed on the cylinder head; a mounting hole penetrating through the thickness direction of the cylinder cover is formed in the cylinder cover and is used for arranging a valve operating rod; a guide pipe sleeve is arranged below the cylinder cover and directly faces the mounting hole in a connected mode, the lower end of the guide pipe sleeve is correspondingly arranged on the box body in a connected mode, and the lower end of the valve operating rod arranged in the mounting hole can penetrate through the lower end of the guide pipe sleeve and correspondingly stretch into the box body from a receding hole formed in the box body. And the lower end of the valve operating rod is matched with the cam in the box body. The utility model has the characteristics that the light-weight design requirement can be better met, and the manufacturing cost can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to an engine technical field, in particular to an engine cylinder structure. BACKGROUND

[0002] The engine cylinder body includes a box body, the box body is provided with a box cover, and the box body further forms a cylinder head, and a cylinder cover is arranged on the cylinder head. The cylinder cover has a pair of mounting holes arranged therein and is used for arranging a valve operating rod, and the lower end of the valve operating rod is used for cooperating with a cam in the box body. The cylinder cover is further provided with a valve hole corresponding to the mounting hole, and a valve is arranged in the valve hole. A valve rocker arm is arranged in the cylinder body, and one end of the valve rocker arm is hinged to the valve operating rod, and the other end of the valve rocker arm is hinged to a valve push rod arranged vertically on the valve.

[0003] In the existing structure, a mounting hole is arranged on the cylinder head to allow the lower end of the valve operating rod to enter and cooperate with the cam in the box body. Such a structure makes the design of the cylinder head part more complex and increases the size of the cylinder head structure, which cannot meet the lightweight design requirement. In addition, due to the complex structure design, only casting can be used for processing, which results in high processing cost and low efficiency.

[0004] Therefore, how to design an engine cylinder body structure with a simpler and more reasonable structure, which can better meet the lightweight design requirement and reduce the manufacturing cost, has become a technical problem to be solved by those skilled in the art. UTILITY MODEL CONTENTS

[0005] In view of the above defects of the prior art, the technical problem to be solved by the utility model is how to design an engine cylinder body structure with a simpler and more reasonable structure, which can better meet the lightweight design requirement and reduce the manufacturing cost.

[0006] To achieve the above-mentioned purpose, the utility model provides an engine cylinder body structure, which comprises a cylinder body; the cylinder body comprises a box body and a cylinder head integrally formed on the box body, and a cylinder cover is detachably mounted and fixed on the cylinder head; a mounting hole penetrating the thickness direction of the cylinder cover is arranged on the cylinder cover and is used for arranging a valve operating rod; characterized in that a conduit sleeve is connected and arranged below the cylinder cover and opposite to the mounting hole, the lower end of the conduit sleeve is connected and arranged on the box body, the lower end of the valve operating rod arranged in the mounting hole can pass through the lower end of the conduit sleeve, and the valve operating rod can be inserted into the box body through a clearance hole arranged on the box body, and the lower end of the valve operating rod cooperates with the cam in the box body.

[0007] Thus, in the engine cylinder structure described above, the conduit sleeve is connected to the installation hole opposite the cylinder head, the lower end of the conduit sleeve is connected to the box, the lower end of the valve operating rod arranged in the installation hole can pass through the lower end of the conduit sleeve, and the valve operating rod can extend into the box through the clearance hole in the box and cooperate with the cam in the box. The channel for the valve operating rod in the cylinder head is replaced by a detachable conduit sleeve, the conduit sleeve forms the original channel for the valve operating rod, the structure of the cylinder head on the box is simpler, and the structure of the entire box is simpler. The overall material consumption of the box is reduced, the lightweight design requirement is better met, and the manufacturing cost is reduced. Moreover, the simpler structure enables the box to be manufactured by pressure casting, and the processing cost is further reduced.

[0008] As an optimization, the installation hole is two, and the conduit sleeve is two corresponding to the installation hole.

[0009] Thus, the number of installation holes and conduit sleeves is more reasonable, and the intake valve operating rod and the exhaust valve operating rod can be installed respectively.

[0010] As an optimization, the lower end of the installation hole has an annular upper installation step surface on the inner wall, the upper end of the clearance hole has an annular lower installation step surface on the inner wall, and the upper end and the lower end of the conduit sleeve are respectively abutted on the upper installation step surface and the lower installation step surface.

[0011] Thus, the installation of the conduit sleeve is more convenient, and the installation is more stable and reliable.

[0012] As an optimization, the upper and lower ends of the conduit sleeve have annular upper and lower matching convex edges respectively, and the upper and lower matching convex edges are respectively attached to the inner wall of the lower end of the installation hole and the inner wall of the upper end of the clearance hole.

[0013] Thus, the structure of the conduit sleeve is more reasonable, and the conduit sleeve can be better assembled in place.

[0014] As an optimization, a protruding installation protrusion is arranged on the box opposite to the lower end of the conduit sleeve, and the clearance hole is arranged on the installation protrusion.

[0015] Thus, by arranging the installation protrusion, the structural strength of the part can be improved, the axial size of the clearance hole can be larger, and the installation of the conduit sleeve is more convenient.

[0016] As an optimization, the installation protrusion extends inward and is connected to the outer circumferential surface of the cylinder head.

[0017] Thus, the protrusion forming is more convenient, and the connecting strength between the box body and the cylinder head is improved.

[0018] As optimization, a protective shell cover is arranged outside the conduit sleeve, and the protective shell cover is arranged on the cylinder head by screw connection.

[0019] Thus, the conduit sleeve is shielded and protected by the protective shell cover, and the structure design is more simple and reasonable.

[0020] As optimization, four connecting holes in a rectangular distribution are arranged on the cylinder cover, connecting screws are arranged in the connecting holes, and the connecting screws are screw-connected in the threaded connecting holes of the cylinder head.

[0021] Thus, the connection between the cylinder cover and the cylinder head is more reliable, and the conduit sleeve is more convenient to disassemble and assemble.

[0022] As optimization, a cylinder cover cover is detachably connected on the cylinder cover.

[0023] Thus, the cylinder cover is shielded and protected by the cylinder cover cover, and the structure design is more simple and reasonable.

[0024] Further, the box body is manufactured by die casting. Thus, the processing cost is saved, and the processing efficiency is improved.

[0025] In summary, the engine cylinder structure has the characteristics that the structure design is more simple and reasonable, the lightweight design requirement can be better met, and the manufacturing cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a schematic view of the engine cylinder structure in the embodiment of the utility model.

[0027] Figure 2 is Figure 1 a schematic view of the structure after rotating by one angle.

[0028] Figure 3 is Figure 1 a schematic view of the structure after removing the protective shell cover and the cylinder cover cover.

[0029] Figure 4 is Figure 3 a schematic view of the structure after rotating by one angle.

[0030] Figure 5 is Figure 3 a schematic view of the structure after removing one conduit sleeve.

[0031] Figure 6 is Figure 5 a local enlarged schematic view of the A position in the structure.

[0032] Figure 7 is Figure 1 Structure diagram of the conduit sleeve in the box. DETAILED DESCRIPTION

[0033] The utility model will be further described below in combination with the drawings and embodiments, and it should be noted that in the description of the utility model, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model in indicating or implying that the devices or elements must have a specific orientation, be constructed and operated in a specific way. Therefore, it cannot be understood as limiting the utility model. The terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0034] As Figures 1 to 7 shown, an engine cylinder block structure comprises a cylinder block body 1; the cylinder block body comprises a box body 2 and a cylinder head 3 integrally formed on the box body, and a cylinder cover 4 is detachably mounted and fixed on the cylinder head; a mounting hole is provided on the cylinder cover and penetrates the thickness direction of the cylinder cover and is used for arranging a valve operating rod 5; a conduit sleeve 6 is connected below the cylinder cover and opposite to the mounting hole, and the lower end of the conduit sleeve is correspondingly connected on the box body, so that the lower end of the valve operating rod arranged in the mounting hole can pass through the lower end of the conduit sleeve and extend into the box body through a clearance hole 7 provided on the box body, and the lower end of the valve operating rod cooperates with a cam in the box body.

[0035] In this way, in the above-mentioned engine cylinder block structure, the conduit sleeve is connected below the cylinder cover and opposite to the mounting hole, so that the lower end of the conduit sleeve is correspondingly connected on the box body, so that the lower end of the valve operating rod arranged in the mounting hole can pass through the lower end of the conduit sleeve and extend into the box body through the clearance hole on the box body and cooperate with the cam in the box body. The whole structure replaces the channel originally provided on the cylinder head for the valve operating rod to pass through with the detachable conduit sleeve, and the conduit sleeve forms the original channel for the valve operating rod to pass through inside, so that the structure of the cylinder head on the box body is simpler, thereby making the structure of the whole box body simpler. The overall consumption of the box body is reduced, which can better meet the lightweight design requirement and also reduce the manufacturing cost. Moreover, the simpler structure enables the box body to be processed and manufactured by pressure casting, which can also better reduce the processing cost.

[0036] In this specific embodiment, the mounting hole is in pairs, and the conduit sleeve is two for each mounting hole.

[0037] In this way, the number of mounting holes and conduit sleeves is more reasonable, and the intake valve operating rod and the exhaust valve operating rod can be respectively installed.

[0038] In the embodiment, the lower end inner circumferential wall of the installation hole is provided with an annular upper installation step surface, and the upper end inner circumferential wall of the accommodation hole is provided with an annular lower installation step surface; and the upper end and the lower end of the guide pipe sleeve respectively abut against the upper installation step surface and the lower installation step surface.

[0039] In this way, the installation of the guide pipe sleeve is more convenient, and the installation is more stable and reliable.

[0040] In the embodiment, the upper and lower end outer circumferential walls of the guide pipe sleeve are respectively provided with annular upper and lower matching protrusions; and the upper and lower matching protrusions are respectively attached to the lower end inner circumferential wall of the installation hole and the upper end inner circumferential wall of the accommodation hole.

[0041] In this way, the structure of the guide pipe sleeve is more reasonable, and the guide pipe sleeve can be better assembled in place.

[0042] In the embodiment, a protruding installation protrusion is arranged on the cylinder head at a position opposite to the lower end of the guide pipe sleeve, and the accommodation hole is arranged on the installation protrusion.

[0043] In this way, by arranging the installation protrusion, the structural strength of the part can be improved, and the axial size of the accommodation hole can be larger, which is more convenient for the installation of the guide pipe sleeve.

[0044] In the embodiment, the inside of the installation protrusion extends inwardly and is connected to the outer circumferential surface of the cylinder head.

[0045] In this way, the molding of the installation protrusion is more convenient, and the connection strength between the cylinder head and the box body can be improved.

[0046] In the embodiment, a protective shell 11 is arranged outside the guide pipe sleeve, and the protective shell is connected to the cylinder head by screws.

[0047] In this way, the protective shell is arranged to shield and protect the guide pipe sleeve, and the structure is more simple and reasonable.

[0048] In the embodiment, four connection holes are arranged on the cylinder head in a rectangular distribution, a connection screw 12 is arranged in the connection hole, and the connection screw is threadedly connected to the threaded connection hole in the cylinder head.

[0049] In this way, the connection between the cylinder head and the cylinder head is more reliable, and the disassembly and assembly of the guide pipe sleeve are more convenient.

[0050] In the embodiment, a cylinder cover 13 is detachably connected to the cylinder head.

[0051] Therefore, the cylinder cover is shielded and protected by arranging the cylinder cover cover, and the structure design is more simple and reasonable.

[0052] Further, the box body is manufactured by die casting processing mode.

[0053] In summary, the engine cylinder structure has the characteristics of simple and reasonable structure design, better meeting the lightweight design requirement, and reducing the manufacturing cost.

[0054] The preferred embodiments of the present application are described in detail above. It should be understood that those skilled in the art can make many modifications and changes without creative labor according to the concept of the present application. Therefore, any technical solution obtained by logical analysis, reasoning or limited experiment on the basis of the existing technology according to the concept of the present application shall be within the protection scope determined by the claims.

Claims

1. An engine cylinder block structure, comprising a cylinder block body; the cylinder block body includes a housing and a cylinder head integrally formed and mounted on the housing, a cylinder head being detachably mounted and fixed on the cylinder head; the cylinder head is provided with a mounting hole extending through its thickness direction for arranging valve operating rods; characterized in that; A guide sleeve is provided below the cylinder head and directly opposite the mounting hole. The lower end of the guide sleeve is connected to the housing, allowing the lower end of the valve operating rod installed in the mounting hole to pass through the lower end of the guide sleeve and extend into the housing through the clearance hole provided on the housing, so that the lower end of the valve operating rod engages with the cam inside the housing.

2. The engine cylinder block structure as described in claim 1, characterized in that... ； The mounting holes are provided in pairs, and the conduit sleeves are provided in pairs corresponding to the mounting holes.

3. The engine cylinder block structure as described in claim 1, characterized in that; The lower end of the mounting hole has an annular upper mounting step surface on its inner peripheral wall, and the upper end of the clearance hole has an annular lower mounting step surface on its inner peripheral wall; and the upper and lower ends of the guide sleeve are respectively abutted against the upper and lower mounting step surfaces.

4. The engine cylinder block structure as described in claim 3, characterized in that; The upper and lower fitting flanges of the conduit sleeve are respectively provided on the outer peripheral walls of the upper and lower ends; and the upper and lower fitting flanges can respectively abut against the inner peripheral wall of the lower end of the mounting hole and the inner peripheral wall of the upper end of the clearance hole.

5. The engine cylinder block structure as described in claim 1, characterized in that; A protruding mounting protrusion is provided on the cylinder body at a position opposite to the lower end of the guide sleeve, and the mounting protrusion is provided with the clearance hole.

6. An engine cylinder block structure as described in claim 5, characterized in that... The mounting protrusion extends inward from the inside and is connected to the outer circumferential surface of the cylinder head.

7. The engine cylinder block structure as described in claim 1, characterized in that; A protective cover is installed on the outside of the guide sleeve, and the protective cover is attached to the cylinder head by screws.

8. An engine cylinder block structure as described in claim 1, characterized in that; The cylinder head has four rectangular connecting holes, and connecting screws are arranged in the connecting holes, such that the connecting screws are threaded into the threaded connecting holes on the cylinder head.

9. An engine cylinder block structure as described in claim 1, characterized in that; A cylinder head cover is detachably attached to the cylinder head.

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